<!DOCTYPE html>
<html lang  = "en">
    <head>
        <meta charset="UTF-8"
        <title> HTML 文档结构<title>
        <style type ="text/css"
            p{font-size:24px; / *定义字体大小 * / }
        <style></style>
       
    </head>
    <body>
        <p> HTML 文档结构由 head,body 标记组成<p>
        <h3>标题字h3</h3>
        <hr size= 3 color = "red">
        <a href="http://www.baidu.com">百度</a>
        <script type= "text/javascript">
             document.write("这是简单的网页！");//向页面输出信息
             </script>
        
    </body>
</html>